It was Crick and Watson who worked out the structure of DNA in the 1950s, but its discovery was made nearly 100 years previously by a Swiss physician called Frederick Miescher.
The residents will range in nationality, cultural, religion, age, sex, political association, socio-economic backgrounds, etc. The Assisted Living Federation of America reports that the average age of an assisted living resident is 86.9 years (female average age 87.3; male average age 85.7). Female residents (73.6%) outnumber male residents by almost 3 to 1.
Senior living communities target people over 55 years old, and specialize in providing housing adapted to the needs of older people. The communities are also known as active-adult communities or age-restricted communities. They offer independent living, but may also provide facilities for assisted living.